Electronic Transfer Case - GMC Sierra 2008 Owner's Manual

Electronic Transfer Case

Use the dial to shift into and out of four-wheel drive.
Recommended Transfer Case Settings
Driving Conditions
Normal
Severe
Extreme
Vehicle in Tow*
*See Recreational Vehicle Towing on page 4-50
Towing Your Vehicle on page 4-49
2-40
The transfer case knob
is located next to the
steering column.
Transfer Case Settings
m m n
2 4 4
YES
YES
YES
You can choose among four driving settings:
Indicator lights in the dial show which setting you are in.
The indicator lights will come on briefly when you turn
on the ignition and one will stay on. If the lights do
not come on, you should take your vehicle to your dealer
for service. An indicator light flashes while shifting
the transfer case and remains illuminated when the
shift is complete. If for some reason the transfer case
cannot make a requested shift, it will return to the
last chosen setting.
m
2 (Two-Wheel-Drive High): This setting is used
for driving in most street and highway situations.
The front axle is not engaged in Two-Wheel Drive.
This setting also provides the best fuel economy.
m
4 (Four-Wheel-Drive High): Use the
Four-Wheel-Drive High position when extra traction
is needed, such as on snowy or icy roads or in most
off-road situations. This setting also engages the
N
front axle to help drive your vehicle. This is the best
setting to use when plowing snow.
n
4 (Four-Wheel-Drive Low): This setting also
engages the front axle and delivers extra torque. You
may never need this setting. It sends maximum power
YES
to all four wheels. You might choose Four-Wheel-Drive
Low while driving off-road in deep sand, deep mud,
deep snow, and while climbing or descending steep hills.
®
StabiliTrak will not engage in this mode.